tree 787ed4b1f3989dcceba6bd2ba3b888e3ae2f4563
parent 4f7d8c2dee624536e30e2fba907e2ce469b2cdf7
author Jason Evans <jasone@canonware.com> 1478219154 -0700
committer Jason Evans <jasone@canonware.com> 1478237603 -0700

Fix extent_alloc_cache[_locked]() to support decommitted allocation.

Fix extent_alloc_cache[_locked]() to support decommitted allocation, and
use this ability in arena_stash_dirty(), so that decommitted extents are
not needlessly committed during purging.  In practice this does not
happen on any currently supported systems, because both extent merging
and decommit must be implemented; all supported systems implement one
xor the other.